Island



AQSCHABR.

Patentedmg. 6,1895

m ,m N .U M N w @Q Q@ onulin jfsr H @DT. d 3= AT JEJM Jusum M N o m j &J f W W N M o. Q Q` ENQFZDQU w .w uw

QN IF-D .1. z.

(No Model.)

GLOTH AND YARN CALCULATING RULE. `No. 543,899.

H v M. .mJWmWDr VIT:

WITNEsSEa l @Mgg the manner of slide-rules.

rrnn STATES PATENT OFFICE.

CLOTH AND YARN CALCULATING RULE.

PECIFICATIGN forming part lof Letters Patent No. 543,899, dated August6, 1895.

Application filed March 30,1895. Serial No. 543,835. (No model.)

.T0 all whom it may concern:

Be it known that I, ARNOLD SCHAER, ot' llarren, in the county of Bristoland State of Rhode Island, have invented certain new and usefulImprovements in Cloth and Yarn Calculating Rules; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form a part of thisspecification.

This invention relates to the class of computing devices for solvingarithmetical questions. Its objectis to provide mechanical means forsolving certain questions that arise in manufacturing textile fabricsthat solved in the usualway require a great deal of iiguring andcalculation on the part of both the manufacturer and the dealer. One ofthese questions, for instance, is, if a dealer wants cloth of a certainwidth and number of yards to the pound, what number of yarn and how manypicks to the inch in weaving will make the goods? Another question is,having goods of a certain width and number of yards to the pound andnumber of picks to the inch, what is the number of the yarn? And havingparn of a certain number, what must be the number of picks per inch tomake goods of a certain width and weight? These and many like questionsthat usually require elaborate calculations, with all their liability toerror, are correctly solved with a single movement of the device whichis the subject of lthis invention. It is fullyexplained and illustratedin this specification and accompanying drawings.

Figure l shows a top view of the calculating-rule closed. Fig. 2represents the same open, as when it is in use. Fig. 3 is a crosssectionor end view.

This calculating device consists of a rule A, of any convenient length,having a dovetailed groove made in the center of its width and extendingthe whole length of the rule. A strip ois fitted to slide in the grooveafter This rule then has four lines of divisions made on it, designatedas 1 2 3 4 in the drawings. Lines l and 4 are made on the rule proper ateach side of the groove, and lines 2 and 3 are made on the slide a. Thespace made by the divisions on the lines l 2 3 commence largest at theleft hand and decrease in logarithmic proportion as they go to theright, and when the slide a is closed in the rule the divisions on thelines l 2 3 exactly agree with each other, though line l is numbered 2 34, while the same divisions on the slide a are marked 2O 30 40, and soon, the figures in the middle ot' the slide serving for lines 2 and 3 oneach side of them. The line 4 of divisions are also made in logarithmicproportion, but increase in the opposite direction to the other lines,and when the slide a is close in No. 40 on the slide is opposite No. 99on line 4. Line 1 of the divisions is marked on the rule as No. of yardsper lb., and line 2 is marked on the slide Av. No. of yarn. Line 3 isalso marked on the slide as Inches wide, and line 4 is designated on therule as Av. count, (or average picks per inch,) which means that as thenumber of picks per inch of the filling may not be the same as thenumber of threads per inch ofthe warp the average of the two is taken asthe average count. If the one was eighty threads to the inch and theother eighty-six threads, eighty-three would be average count. The sameremark applies to the Av. No. of yarn marked on line 2 of the divisions.

To use the rule to solve the following questions: If the cloth is fortyinches wide and the average count per inch eighty, move the slide a sothat 40 on the line 3 is opposite to SO on line 4, and opposite to thenumber of yarn on line 2 will be the number of yards per pound the clothwill be. If the yarn is No. 30, cloth will weigh three and sevententhsyards Vper pound. lf the yarn is No. 60, the cloth will run seven andfour-tenths yards per pound. And the reverse process is also correct. Itthe cloth weighs four and nine-tenths yards per pound and the yarn isNo. 40, bring 4,5% on line l opposite 40 on line 2, and opposite anywidth of cloth on line 3 will be found on line 4 the number of count perinch necessary to make the goods. It the count is 100 per inch on line4, the width will be thirty-two inches on line 3. If the count is 75,the width will be forty-nine inches. And if the number of the yarn is 8Oon line 2 and the count is 60 on line 4 and they are placed oppositeeach other, then opposite any IOO width on line 3 is the number of yardsper pound on line 1. Those examples are but few of the many in which bythe use of the rule calculations can be quickly made that comparativelyfew are qualified to make in the usual way because of the number offactors and their relations to each other.

Having thus described my improvement, I claim as my invention and desireto secure by Letters Patent* l. A rule for use in calculating therelative size and weight of yarn and cloth, having a sliding portion init marked with two rows of divisions increasing in logarithmicproportion to each other, from one end, a row of divisions on the ruleto one side of the slide, agreeing with the divisions on the slide, andhaving a row of divisions increasing in logarithmic proportion to eachother from the other end of the rule, substantially as described.

2. A rule for use in calculating the relative size and Weight of yarnand cloth having a sliding portion in it marked with two rows ofdivisions increasing in logarithmic proportion to each other, from oneend, the upper row being marked Av. No. of yarn and the lower row markedNd inches in width, a row of divisions on the rule to one side of theslide, agreeing with the divisions on the slide and marked No. of yardsper 1b., a row of divisions increasing in logarithmic proportion to eachother from the other end of the rule and marked Av. count, substantiallyas described.

3. In a calculating rule the combination of three lines of divisionsexactly agreeing with each other and increasing in logarithmicproportion to each other from one end of the rule, two of said linesbeing made on a slide movable on said rule, and the other line of theVthree made on the rule to one side of the slide, with a fourth line otdivisions of like proportions to each other but made in rcversed orderon the rule to the three Iirst lines of divisions7 substantially asdescribed.

ARNOLD SCl'lAlilR.

Witnesses:

BENJ. ARNOLD, JAMES E. ARNOLD.

